Some improvements to Tables and OverviewPage

[Lionqueen94]

Description

• Added Footer to OverviewLayout and removed from all child pages, reason: ElectionReportPage was missing the Footer
• Set the correct gray color for the Chevron in the icon with fill because background-image color cannot be set, meaning the Chevron in the Table.LinkRow was black instead of gray
• Made sure Table.LinkRow last Cell has increased padding to make sure the padding around the Chevron is as designed
• Made sure all Table functions accept a className
• Renamed Table.Column to Table.HeaderCell since it can also be used in a row
• Added a scope="row" | "col" with a default set to "col" to Table.HeaderCell to allow row th usage
• Made sure Table.HeaderCell can have no children, equal to the implementation of Table.Cell
• Showing a message that no elections exist on OverviewPage instead of throwing a harsh error, separate designs for typist and administrator are implemented
• Added tests for OverviewPage
• Corrected error icon color in Alert, ProgressList and StatusList and small alert text color
• Made sure there is no empty table when there are no polling stations to input on polling station choice page

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.15%. Comparing base (18917fc) to head (5fe59c8).

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #990      +/-   ##
==========================================
+ Coverage   89.76%   90.15%   +0.38%     
==========================================
  Files         248      247       -1     
  Lines       12987    12983       -4     
  Branches     1318     1327       +9     
==========================================
+ Hits        11658    11705      +47     
+ Misses       1235     1184      -51     
  Partials       94       94              

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[github-actions]

Sigrid maintainability feedback

✅ You wrote maintainable code and achieved your objective of 3.5 stars

Show details

Sigrid compared your code against the baseline of 2025-02-10.

👍 What went well?

You fixed or improved 1 refactoring candidates.

Risk	System property	Location
🟡	Unit Size (Improved)	frontend/app/component/form/data_entry/polling_station_choice/PollingStationsList.tsx PollingStationsList.tsx.PollingStationsList(PollingStationsListProps)

👎 What could be better?

Unfortunately, 1 refactoring candidates were introduced or got worse.

Risk	System property	Location
🟡	Unit Size (Worsened)	frontend/app/component/form/data_entry/polling_station_choice/PollingStationChoiceForm.tsx PollingStationChoiceForm.tsx.PollingStationChoiceForm(PollingStationChoiceFormProps)

📚 Remaining technical debt

8 refactoring candidates didn't get better or worse, but are still present in the code you touched.

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⭐️ Sigrid ratings

System property	System on 2025-02-10	Before changes	New/changed code
Volume	5.2	N/A	N/A
Duplication	4.3	5.5	5.5
Unit Size	2.4	2.7	2.8
Unit Complexity	3.4	3.7	3.8
Unit Interfacing	3.0	5.5	5.5
Module Coupling	4.0	5.5	5.5
Component Independence	2.8	N/A	N/A
Component Entanglement	3.7	N/A	N/A
Maintainability	3.6	4.4	4.5

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